Tanaydin M.K.Demirkiran N.Ekmekyapar A.2024-08-042024-08-0420139781632662989https://hdl.handle.net/11616/92373Boren;DEMiR Export;et al;metso Expect results;Outotec;TMMOB Maden Muhendisleri Odasi23rd International Mining Congress and Exhibition of Turkey, IMCET 2013 -- 16 April 2013 through 19 April 2013 -- Antalya -- 105453In this work, the leaching of malachite, an oxidized copper ore, in ammonia/ammonium chloride solution was studied. The effects of the reaction temperature, ammonia and ammonium chloride concentration, and stirring speed on the leaching of malachite were examined. According to findings obtained, it was determined that ammonia/ammonium chloride ratio has a considerable effect on the dissolution of ore. It was observed that the dissolution rate increased with increasing temperature, and the stirring speed has not a considerable effect. The kinetic analysis of the leaching process was performed by applying the heterogeneous reaction models, and it was found that the leaching reaction followed the mixed kinetic controlled model. It was determined that the leaching reaction was controlled by diffusion at low temperatures, while it was controlled by chemical reaction at high temperatures. The activation energies for two consecutive mechanisms were calculated to be 19.5 and 50.8 kJ/mol, respectively.eninfo:eu-repo/semantics/closedAccessActivation energyCarbonate mineralsChlorine compoundsDissolutionLeachingOresAmmonium chlorideChloride solutionsDissolution ratesHeterogeneous reactionsIncreasing temperaturesLeaching reactionOxidized copper oreReaction temperatureCopper ore treatmentConference Object2142514292-s2.0-84901912859N/A